Pump.



R. E. BECHTOLD 61 A. D. WYCKOFF.

PUMP.

APPLICATION FILED AUG. l9, 19I2.

* L1%,Q0 1111-1111111 Dec. 21, 191.5.

4 SHEETS-SHEET 2- R. E. BECHTOLD & A. D. WYCKOFF.

PUMP- APPLICATION FILED AUG. 19, 1912.

LHMWUU. Patented Dec.21,1915.

4 $HEETSSHEET 3.

R. E. BECHTOLD & A. D. WYCKOFF.

PUMP.

APPLICATION FILED AUG. 19. m2.

L1@%,WUU Patented Dec. 21, 1915.

4 SHEETSSHEET 4.

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Law

purruu s'ra'rns rain q @FFFFFL REUBEN BECHTOLD. AND ANDREW D. WYCKOFF, OF FORT WAYNE, INDIANA,

ASSIGNORS T0 S. F. BOWSER & 00., INC., 015 FORT WAYNE, INDIANA, A CORPO- RATION OF INDIANA.

Specification of Letters Patent.

PUMP.

Application filed August 19, 1912; Serial No. 715.698.

1'0 all whom it may concern: I

Be it known that we, REUBEN E. BECHTOLD and Axnnnw D. lVYCKoFr, citizens of the United States, residing at Fort Wayne, in the county of Allen and State of Indiana,

have invented certain new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to pumps of the class known as the reciprocating piston type, and the principal object of this invention is to provide a. simple, compact and easily operated pump of this type which is effective and efl'icient in operation, and adapted to discharge a continuous and uniform or approximately uniform stream of liquid without change in the direction of movement of the piston operating means.

Another object of the invention is toprovide a pump of the class described in which a constant direction of movement is imparted to a shaft, which in turneffects the movement of reciprocah-le plungers without the medium of racks or gears.

Another object of the invention is to provide means to vary the length of the stroke of the pistons or 'plungersiv Another object of the invention is to vary the duration of the power stroke without affecting the operating means, in other words, to lengthen the duration of the power stroke and to correspondingly reduce the duration of the return stroke in order that the power stroke of two reciprocating pumps may overlap to produce a continuous flow and pressure on the liquid pumped, whereby both rate of flowvand pressure are substantially uniform throughout the cycle of movements of the pump.

To the attainment of these ends and the accomplishment of other new and useful objects, as will appear, the invention. consists in the features of novelty in the con structiqn, combination and arrangement of the several parts generally shown in the ac principles of our invention; it also shows the pressure or flow of the liquid tobe pumped substantially the same at all times;

Fig. 3 is a detail view of one of the pivoted member, showing the discharge chamber;

and Fig. 8 is a plan view of the top of said head member. v 7

It has been the practice in constructing pumps, and particularly self-measuring pumps for discharging the liquids from tanks and the like, to make use of rack and pinion movements for operating the piston or pistons. In single cylinder pumps a pinion connected with suitable operating means as a handle has been used in mesh with a rack secured to the piston. The result of such construction is that during one .stroke of the piston the liquid to be pumped flows into the pump barrel or cylinder during which time there is no discharge and therefore only each alternate stroke of the pump piston would be efiective to discharge liquid from the pump. Such construction has' made it necessary to stop the operating means at the end of each stroke of the piston and reverse the movement of the same, 7

which also results in considerable 'loss of time in. the pumping operation with the attendant loss of energy due to the necessity for reversal of the'operating means. Vhen it has been sought to overcome these difliculties by the use of double cvlinder pumps, each piston of which is provided with a rack and the racks in mesh with a common gear or pinion, the racks have been associated with the operating gear or pinion on opposite sides thereof so that the pump pistons or plungers will be operated in opposite directions, the piston or plunger of one cylinder discharging while the piston or plunger of the other cylinder is on the return 'movement with the liquid to be pumped 'flowinginto the vacuum within the cylinder created by the return movement of the piston. This construction insures that one or the other of the cylinders shall be constantly discharging liquid while the operating mechanismis moving, but does not obviate the necessity for reversing the driving mechanism and the attendant loss of time in stopping of the flow of liquid necessary to such reversal of the operating means. Therefore, while this last-mentioned construction of double cylinder pump has proven to be more efficient than a singlecylinder reciprocating pump, it is defective for the reasons stated in not providing pumping means which will discharge a continuous and uniform or approximately uniform stream of liquid.

The present invention proposes that in place of providing a single reciprocating pump driven by driving gear and rack or I double cylinder pumps or pump cylinders with pistons driven by the same mechanism, that a plurality of separate single-acting pump sections shall be employed which are "suitably connected with operating cranks driven constantly in one direction from a common source of power and so arranged that the power strokes of the pumps overlap, resulting in a continuous supply of fluid at a substantially constant pressure; When only two pumping sections are employed, asherein particularly shown and described,- it becomes necessary to provide means whereby the power strokes of each of the sections be prolonged and the return stroke be correspondingly reduced, the entire operation constituting a complete cycle of operations.

A further object to be attained by the present invention is to provide means not only for varying. and adjusting the duration of both the power and return stroke, but also to provide means for varying the length of the stroke. A slight variation of the length of the stroke is very frequently desirable for the reason that in pumps of this class it is customary to proportion them so that a complete stroke of the piston or plunger in the cylinder will discharge a specified amount or quantity of liquid. By

.means of the adjustment herein described this amount may be regulated to a nicety.

Referring now more particularly to the drawings and inthe present exemplification of the invention, as illustrated by Fig. 1, a

pump constructed in accordance with the principle of the invention is shown mounted upon a supply pipe 10 which is provided with an adjustable collar 11 positioned near the ground or support for the pump, in order that itmay be stayed in position and protected about the base of the pipe.

The pump properconsists of a plurality of separate pump cylinders 12 one of which is shown in section in Fig. 6. These pump cylinders are provided at the bottom with a base member 13, which is secured to the supply pipe 10. and which forms a common inlet chamber for all of the pump cylinders.

means of the rods 15, which pass through suitable openings in each of the said members, and the ends of which are threaded to receive the nuts 16. The pump cylinders 12 are suitably positioned between these members 13 and 14, and are held in position by means of the rods 15. Surrounding the cylinders is av casing 17 which forms a suitable covering for the pump cylinders.

Interposed between each of the pump cylinders and the inlet chamber in the member 13, and suitably held in position by the said member, are valves, one of which is shown in section in Fig. 6. This valve comprises a valve seat member 18, with a central hub portion 19, around which are openings, and with an outwardly extending flange portion 20. A valve member 21 having a stem 22 and an adjustable nut 23 mounted thereon, is adapted to bepositioned in said hub portion, and to move freely therethrough, being limited in its upward movement by the position of the nut 23, and the normal'position of the valve member 21 being upon the valve seat member 18. To secure the valve seat member in position an internally threaded opening is provided in the bottom member 13, in which the member 18 is placed, and packing material 21 being interposed between the member 18 and the bottom member 13, and anexternally threaded sleeve 25 is screwed in the said opening .against the flange portion 20 of the valve of fluid to the pump cylinder, and will prevent the egress of fluid therefrom.

A piston or plunger is disposed within each of the pump cylinders, and is reciprocally movable therein. Each plunger in the present exemplification of the invention comprisesa rod 26 formed with a shoulder 27, and threaded at its lower end to receive a nut 28. Positioned on the rod 26 and bearing against the shoulder 27, is a plunger member 29, having a hub portion 30 and fitting the inside of the cylinder closely with openings therethrough between the outer edge or rim and the hub portion 30; The upper edges of the member 29 are formed with edges 31 and 32 on the hub portion and the outer rim portion respectively. A valve seat member 33, slidable upon the. rod 26,

V is positioned above the shoulder 27, and enwith respect thereto is limited by a pin 34, or other suitable means secured to the rod 26. The lower portion of the member 29 is preferably formed with a diameter somewhat less than the diameter of the cylinder and with a groove or depression 35. A clamping member 36 is positioned on the rod 26, below the member 29, and interposed between these members is a packing material 37 which engages the walls of the cylinder, and is preferably formed into such.

engagement by a suitable resilient member 38, the packing material being held in position between the two members 36 and 29 by means of the nut 28, which is threaded upon the rod 26. The member 36 is also apertured surrounding its material hub portion, so that when the valve member 33 is raised from the valve seats direct communication is turned through the plunger to permit the flow of fluid therethrough. The disposition of the valve members is such that upon the down stroke of the plunger the valve member 33 is raised from its seats, and upon the up motion of the'plunger the valve member 33 is retained in position upon its seats. It is manifest that the actions of the valve in the plunger and the valve at the bottom of each cylinder are directly opposite; in other words, the action of one is the reverse of the other.

To provide a fluid tight construction about each rod 26, the top member 14 is formed with bosses 39, through which the rods 26 extend. A gland 40 is positioned about each rod 26, seated in the boss 39, and held in position by a packing nut 41, suitable packing material 42 being disposed in the space between the boss and the gland. The portion of the rod 26 which is movable through the packing head is preferably provided with a shell or sleeve 43, of material that will not corrode so readily, thereby maintaining a smooth surface where the rod slides through the packing material.

Inside of the head member 14, surrounding each of the rods, is a depending portion 44, which extends downwardly in the discharge chamber. An outlet or discharge opening 45 is disposed in the outer wall of the head member 14, at such a position that the lower edge of the opening willbe above the depending portions 44, which surround the rods 26. A partition 44 is disposed in the me ber 14 between the portions 44 and the on let opening 45 which depends from the top of the member. The object of this construction is to provide a space in the head member or the discharge chamber above the lower edge of the partition 44' and above "the lower end of the depending portions 44, to form an air chamber for permitting the expansion of fluid in the cylinder. and in the discharge chamber.

This will form a fluid seal for the air champ ber and will insure that the head of the fluid in the pump and in the discharge chamber at each time will be a certain amount providing there is no leakage past the plungers, and even if the discharge nozzle remains open. Connected to this discharge opening 45 is a nozzle or discharge faucet 46 (see Fig. 1 I

Disposed'above the pump cylinders and preferably secured thereto by means of the rods 15 and nuts 16 (see Figs. 1 and 6) is a housing 47, which contains the. plunger operating mechanism. This mechanism comprises a crank shaft 48, provided. in the present exemplification of the invention,

with two cranks 49 and 50, preferably disposed opposite to each other or at an angle of 180 degrees. This crank shaft is suitably mounted at its ends in the housing 47, one of the ends, as 51, being longer than the other, and extending through the housing. A gear 52 with an extending sleeve portion 53, is mounted upon the shaft 51, and preferably inside of the housing, with the sleeve portion 53 extending outwardly. A crank handle 54 is attached to the hub or sleeve portion 53 of the gear 52 and is secured against rotation on the hub or sleeve portion 53 by means of a kev 55, and against lateral movement by means of a set screw 56. The hub or sleeve portion 53 is preferably bored out so that it will slip freely on to the shaft 48, and is connected to the crank shaft by means of a key 57. The key way in the hub constructionis to provide means for releasmg the clutch in a meter deslgnated generally by the reference numeral 57, to which the gear 52 is connected, and which constitutes no part of the present invention. The construction and operation of -this feature, however, will be described and claimed in another application. lit will be evident, however, that as the crank-handle 54 is rotated the crank shaft 48 and the cranks 49 and 50 will be correspondingly rotated.

At one side of the housing, and preferably at a point below the center of the crank shaft 48, is an eccentrically mounted shaft or pin 58. This pin 58 is provided with a bearing support 59, at one end and at the other end is provided with means for adjustin g the position of the pin and for holding the pin against rotation after the adjustmade to turn in the machined hole 68, which, properly speaking, forms the bearing for this end of the shaft. A screw plate 64: is threaded on its outer circumference, so that it may be screwed into position in a threaded opening 65 in the housing. This screw plate 64 is provided with clamping screws 66 which are adapted to engage the clamping collar 61, and to hold it'in position.

A cap 67 is provided for the threaded open ing 65, which is adapted toprevent the exposure of the adjusting means of the pin'58. This cap is preferably provided with a perforated lug 68, which is in proximity to a lug 69 on the housing 47, so that a seal 70 may be attachedafter the pin 58 has been properly adjusted, therebypreventing an unauthorized person from tampering, with the adjustment-of the pin without detection. Pivotally mounted upon this pin 58 are levers or members 71 and 72, preferably U shaped in construction, as shown more clearly by F igs-.- 3 and 4, one of them being shown in section in Fig. 5. Each of these members is mounted at the rounded end of the pin 58, with the ends extending on opposite sides of the cranks 49 and 50, so that the cranks in rotating will produce an up and down movement of each of the members about its point of pivotal support. The extending. sides of each member form a guideway or slide 73 (see Figs. 3 and l), in which a bearing for one of the cranks is slidable. This bearing preferably comprises a pair of segments 7-1 which surround the portion of the crank which may be referred to as crank pin, and the segments may be secured together by means of the pins 75. From this it will be evident that as the cranks are rotated the bearing members will slide in the guideway 73, causing thereby an up and down movement of the members 71 and 72 about their point of pivotal support. Each of the members 71 and 72 is connected by means of a bar 76 to one of the pump plunger rods 26. Any desired or suitable pivotal connections may be made between these members. for example, as shown in Fig. 4. it being necessary only to provide a freely rotatable pivotal connection. It is. therefore. evident that as the crank handle M is rotated the plungers in the pump cylinders will be reciprocated in succession.

- Each of the levers 71 and 72 is preferably provided with an oil box 77 on the top side. These oil boxes supply-oil to the various moving parts, through suitable rmenings. and a tube-78 is preferably provided in, the housing 47 above each of the levers. so that the oil boxes may be filled from the exterior of the housing. By reference to Fig. 3, it will be evident that Withthis construction the duration of one of the trokes of each of the piston rods 26 will be greater than the other stroke. This will be clearly seen by reference to Fig. 3, because of the fact that the plunger will be at the bottom of its stroke when one of the pivotally mounted members is at its lowermost position, and will be at the top of its stroke when the member is at its uppermost position. These respective positions are indicated by the dotted lines 79 and 80, which represent the center line of one of the members with respect to the circle described by the center of one of the crank shafts. In other words. the respective duration of each of the strokes of one of the plunger-s is represented by the portion of the circle inclined between the two points of tangency. In the present construction the power stroke is of longer duration than the return stroke of the plunger. By varying the distance of the center of the pivotal pin 58 from the center of the crank shaft 48, the duration of the strokes may be varied. For example, by moving the point of pivotal support toward the center or axis of the crank shaft, the longer stroke is made of a greater duration and the shorter stroke of a less duration. and by increasing the distance between the point of pivotal support and the center line of thecrank shaft. the longer stroke is reduced in duration and the shorter stroke is correspondingly increased in duration. 'This, in a pump having two pumping sections, as described. in the present exemplification of the invention, causes the power strokes of the two pumps to overlap so that they will maintain a constant flow of fluid and a constant pressure on the discharge chamber.

The operation is graphically shown in Fig. 2, in which the curve ABCD represents the power stroke of one of the pumps, and the curve EFG the power stroke of the other pump. These curves are platted with the vertical distance representing the pressure or flow of the liquid and with the horizontal distance representing the time or duration. .The entire distance as shown represents a complete cycle of operations; that is, corresponding to a complete rotation of the crank handle or 360 degrees. As the power strokesof both of the pumps are of greater duration than the return strokes, it is evident that the power strokes of both pumps must overlap, and that in overlapping the quantity of liquid pumped by each pump must be added, as at H so that for a complete cycle of operations the amount of liquid pumped would be represented by the curve AHF.-ID,

1,1o4,7oo

curve. It should also be noted that the cycle of:operationswmay be colhmenced at any time and'stopped at'any-ti1fn ;=wit11 the result that the amount, of liquid pumped during the time elapsing be substantially constant; and particularly-is this truewhen any equal" division of a completecycle'of operations isperformed because the amount pumped is so near an approximation to a constant amount 'as' to amount to a continuous discharge of the same amount. Another feature the invention that by varying the position-of the pivot pin 58 in avcrtical direction- Withrespect to the crank shaft, the length 'of stroke of the plunger may be correspondingly diminished m 'in'creased. In thepresent exemplifijcat'ion of the invention s'ince'the axis of the pivot pin-"58 is disposed below the. axis :of the crank shaft, the movement er, the pivot pin about its eccentric hearing so that thecenter of pivotal support is lowered, will result in an increase in the 'length'of the stroke of the plunger and the movement irrthe op 5 posite direction will result in a diminishlng of the length of the stroke of the plunger; This is a'very valuable feature inpumps of this class, for the reason that it;is"-som'e-, times desirable to vary the amount pumped during a single stroke, because'of the inaccuracies ofconstructionfand for the) reason that it is usuallydesirableto pump a specifled amountupon a single rotation of the crank handle. By the simple variation of j While Wehave thus described the preferred embodiinenfl'of "our invention; is evident that others'ski lled in the-arts to which this zip-pertains maymake various -changes in the 4 construction, "combination and arrangement I otthe several .parts which constitute: our in venti'on without departing from the spirit and? scope theretifi v 1" Wh'at we claim is: a y

1. rue combination in a single action recipro'c aftingi pumptof a rotatable "crank, a yoke in'which the crank slidesasthe crank rotates; a piston connected toflthe yoke and an eccentrica'lly adjustable pivot "upon an which the yoke is mounted on one end,,the pin beih'g adjustable to vary the leng thand to adjust the duration ofthe eiiective power stroke at the same time.; i

QQ-The combination with a single action a reciprocatinxg'puinp, of an adjustable eccenthe position of the pivot pin 58 considerable adjustment is permitted in" either direction. From this it will be evident that thelength trio means to vary the length of stroke of the ump plunger; and means w secure the ec'c'entrf-icjin position for airy variatiom l 3 I The combination with a single action reciprocating pump, of an -ecce'ntric to vary the length and theg comparativeduration of the power strok of thepump' plunger with respect to the eturn'stroke;* i

' 'eEJThe combinationWvith a single action reciprocating pump of means to fisimultw neously vary and'ajdju'st the"length and'duration of the efi'ective power stroke by a single l operation;

. any variation. r

A continuous flow pump comprising'a plurality of single action reciprocating pumping elements, means to operate the pump plungers,-=and-means to vary the length of strokes and the duration of the power and, return} strokes, the operating means being independent of said varying means.' I A continuous flow pump comprising a plurality of single action reciprocatingpumping' elements, cranks' -disposed at an angle to each-other andoperativetogether; an eccentricallyadjustable pivot 'pin'fand yokes mounted at one end on "the pin; each having aslidable connection with one of the cranks and directly-connected to one or the pump"- ing-f plungers to comm'unicate thecrank actionto- -the' plungers and to cause the power strokes of-the pumps to overlap whereby a continuous flow-of liquid results.

- 1- 93 A- centim tre pump comprising tw in le ti n ec procaanep ps c me' inch discharge chamherforth pumpsmea'ns tuo e atethepumpaan ec'cntr lyadjus'tableipi' 't'pin and-yoke's 'n'n'ou'n'tedati onied on theprmeach having a slidab'le cohnect 1'1 with oneofthe cranks; .and directly conneca 12o ed to one of the' -pu'mp fpistonsto cause the power strokes of the two '13 umps' to' overlap, thereby-1 obtainirigi3a continuous supply-* of fluid in thedischar e-chamber aijsub stantiallyy con'stant .p1'essure -the[ return 1% strokes otthe umps being of shorter dur'm t-ion'gthan power-"stroke's.-' I i.

10. Gi lie combination with a single-action reciprocating pump; of a rotatable 5 crank; a member plvoted-to the pump in-which the 13!) I which the member is pivoted at one side of the pump, movable toward and from the pump to vary the duration of the efiective power stroke with respect to the return stroke.

12. In a continuous flow pump, the combi-.

nation with reciprocable plungers, of a rotatable crank, and a member adjustably pivoted at one end and having connection with the crank and the plunger and being pivoted below the axis of the crank whereby the up stroke of the plunger is made of longer duration than the down stroke.

13. In a pump of the class described, the combination with a reciprocable plunger, a rotatable crank, of a member ustably pivoted at the side of the crank for movement in all directions and having connection with the crank and the plunger whereby the length of and duration of the strokes of the plunger may be varied by such movement.

14. In a pump of the classdeseribed, the combination with a reciprocable plunger, of a rotatable crank, an adjustable eccentric pivot pin, a member having one end pivotally mounted on the pin and engaging the crank,--means to connect the plunger to the said member, whereby the rotation of the 'crank will effect the operation of the plunger,"the adjustment of the pin being adapted to vary the length and duration of the plunger strokes. i

15. In a pump of the class described, the "combination with a reciprocable plunger, of a 'rotatable crank, an eccentrically mounted pivot pin, a member having one end mounted on said pin," the other end being forked and portions thereof extending on" opposite sides of the fcrankpin', the member being adjustable'uponthe sa d pivot pin with respect to the crank theleng'th'and duration of the stroke may be varied, and means to connect the said member to the plunger.

16. In a pump of the class described, the combination with a reciprocable plunger, of a rotatable crank, an adjustable eccentrically mounted pivot pin, a U-shaped member with the rounded portion mounted on the pin for adjustment in any direction to vary the length and duration of its movements, and the ends extending on opposite sides of the crank, the said crank sliding between the ends asthe crank is rotated, thereby oscillating the member about its point of pivotal support, and means to connect the member to the plunger.

17. In a pump of the class described, the combination with a reciprocable plunger, of a rotatable crank, an adjustable eccentrically mounted pivot pin, a U-shaped member with the rounded portion mounted on the pin and the ends extending on opposite sides of the crank, and forming a slide therefor, bearing members surrounding the crank pin and movable in the slide, the rotation of the crank causing the bearing members to move in the slide and to move the said member up and down about its point of support, and means to connect the said member to the plunger to reciprocate the plunger.

18. Ina pump of the class described, the combination of a member forming a common discharge chamber, a plurality of rods movable therein and through the top of said member, the said member being provided with a discharge opening, depending per-- tions surrounding said rods and a partition extending downwardly from the top of the member between the opening and said depending portions below the bottom of said dis'chargeopening to form a fluid seal for saidchamber. v I

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, on this 8th day of August, A. D. 1912. r

. REUBENE. BE'CHTOLD. ANDREW- D. WYCKOFF. ;Witnesses; .C..M...S1\n m,

; JQIRiMA'rLAGI Copies of this patent maybe obtaiinedjfpr five eents each, by addressing the Commissioner of Patents, I I I WashingtbmDC. I 

